Electric-arc lamp.



116732343. PATENTED AUG 25, 1903. T. L. GARBQNE. ELECTRIC ARC LAMP.

APPLICATION FILED FEB. 7. 1903.

N0 MODEL mill glam 12 Z W\TNE 55E 6 iNVENT OR ZLMW 5 i J W m ATTQ RN era nTo. 737,343.

I UNITED STATES Patented August 25, 1903.

PATENT OFFICE.

ELECTRlC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 737,343, dated August 25, 1903.

Application filed February '7, 1903- erial No. 142.387. (No model.)

T at whom it may concern.-

Be it known that I, TIro LIvIo OARBONE, a subject of the King of Italy, residing at Grunewald, near Berlin, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Are- Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention. 7 The present invention relates to an arclamp.

The invention consists in the construction, combination, and arragement of parts hereinafter described, and particularly pointed out in the claim.

One mode of construction of the new arclamp is shown on the annexed drawings.

Figure 1 is a front View. Fig. 2 is the corresponding side view. Fig. 3 isa plan view. Fig. 4 is a section on lineA B of Fig. 2.

The support 2 is fastened on the carrierplate 1, three rods 3 at 5 being inserted in the former. A foot-piece 6 is fastened on the lower end of said rods and holds the baseplate 7, under which the arc is formed. The

. rods 3 4 are arranged at an inclination one to the other corresponding to the inclination of the carbon rods, while the rod 5 stands ver-' tically. The rod 5 passes through ahole 8 of the sliding plate 9, and the rods 3 and 4:63.011

pass through a hole provided in each of the clamps 10, supporting the carbon rods of the upper electrode. The clamps 1O slide on the front side of the sliding plate 9 and are suspended on the screw-bolt 12 of the sliding plate 0 by means of links 11.- A band 13,- attached on the sliding plate 9, is wound on the pulley 1%, with which a second pulley 15, containing the band 16, is rigidly connected. The pulleys 14 15 are insulated one from the other and'are fastened on a common axle 17, journaled in the frame 18, which is pivotally mounted on a support 20. The support 20 is fastened on the carrier-plate 1 and bears the standard 21, on which the frame 18 rests in its lowest position. Anelectromagnet 23 is provided above the frame 18 by means of a support 22. As soon as the electromagnet receives current it attracts the armature 24:, fastened on the frame 18, so that the latter the carbon rods being guided near to their lower ends in an opening of the foot-piece 6. The whole device is arranged in such a way that the carbon electrodes have the right distance for the are if theframe 18 rests on the standard 21. The diameters of the pulley 14 and 15 are chosen at such a relation that the carbon 27 is raised exactly the same amount as it burns oif. The upper carbons 28 29 sink automatically, owing to the weight of the sliding plate-9 as they burn off, so that the arc is always formed at the same place under the bas'e-plate.

When the arc-lampis inserted in the circuit, the electromagnet 23, which is shunted with regard to the arc, attracts its armature 24 and lifts the frame 18. The lower elec trode is thus more raised than the upper one, since the distance of the band 16 from the pivot 19 is greater than that of the band 13 from the pivot 19. As soon as the lower electrode touches the upper one-the shunted electro nagnet 23 receives less current, so that it drops the armature 24. The frame 18 comes again to rest on the standard 21, so that the lamp burns with an arc of the proper length. The sliding plate 9 sinks at the same rate as the upper electrode, consisting of the two inclined carbon rods 28 29, burns off, so that the points of these carbons touch one another always at the same place underneath the base-plate 7,

because the clamps 10 are suspended by means of links 11 and because they are guided always in the same direction by the rods 3 4:. The band 16, carrying the lower electrode, is wound up on the pulley 15 as the sliding plate 9 sinks. I

Having now described my invention and in what manner the same is to be performed, what I claim, and desire to secure by Letters Patent, is-

An arc-lamp, the upper electrode of which consists of two carbon rods, inclined together at an acute angle and suspended by links on a sliding plate, which automatically sinks by In Witness whereof I have hereuntoset my its own weight, as the carbons burn off, the hand in presence of two Witnesses. lower electrode consisting of a single carbon, Y 1 suspended on a pulley rotating with a second rHTO LIV IO OARBONL' 5 pulley, which is connected to said sliding Vitnesses:

plate by means of a band, substantially as HENRY HASPER, shown and described. WVOLDEMAR HAUPT. 

